Track Pad Control Unit for Precise Pointer Positioning
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Solution Overview
Problem
Existing input devices with touch surfaces face limitations in operability due to the size of the operation surface, making it difficult for users to accurately control the movement and stopping position of pointers or indices, such as mouse pointers, during operations.
Innovation Solution
A display apparatus comprising a display unit, an operation detection unit, and a control unit that detects operations on the surface, moves a display object in response to changes in the operation position, and stops the movement based on preset ending conditions, allowing for greater control over the movement amount and direction, even beyond the physical limits of the operation surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the operation surface size is reduced, then the device becomes more compact, but the operability and control precision deteriorate
Solution Approach 1:
The patent introduces a virtual operation space that extends beyond the physical operation surface boundaries. By mapping finger movements on the small touch surface to a larger virtual coordinate system, the system achieves mouse-pointer-level control range while maintaining a compact physical device. This dimensional mapping allows users to access the full display area without requiring a proportionally large operation surface.
Solution Approach 2:
The system dynamically adjusts the mapping parameters between finger position and display object position. By changing the scale and transformation parameters based on the detected finger movement, the system can achieve precise control of display objects even with limited physical movement range on the operation surface.
2Volume of moving object
If the operation surface size is reduced, then the device becomes more compact, but the control precision of ending position deteriorates
Solution Approach 1:
The system continuously monitors finger position on the operation surface and provides real-time feedback by moving the display object accordingly. This closed-loop control allows users to see the effect of their movements and make fine adjustments to achieve precise stopping positions, compensating for the limited physical surface area.
Solution Approach 2:
By creating a virtual operation space that is larger than the physical surface, the system maps small physical movements to larger virtual movements, enabling precise control of display object positions that would otherwise require a much larger physical surface.
3Ease of operation
If the display object movement distance is limited by operation surface size, then the operation becomes constrained, but the device complexity increases if virtual expansion is implemented
Solution Approach 1:
The system creates a virtual copy of the operation space that is scaled and mapped to the display object movement. Instead of requiring physical expansion, it uses software-based coordinate transformation to simulate a larger operation surface, maintaining simplicity while achieving expanded functionality.
Solution Approach 2:
The patent implements a virtual coordinate system that maps the physical operation surface to an expanded virtual space. This allows the display object to traverse a larger area than the physical surface would suggest, achieving operation freedom without proportionally increasing device size or hardware complexity.
Data Source
AI summary
A display apparatus includes an image display unit that allows a user to view an image. The display apparatus includes an operation detection unit that detects an operation on a track pad and a control unit that displays an operation target display object on the image display unit. The control unit controls a display position of the display object in response to an operation on the track pad, obtains a movement direction of the display object in response to a change in an operation position on the track pad, moves the display position of the display object, and stops moving the display object in a case in which an operation on the track pad corresponds to a preset ending condition.